Vinod Kumar: Apache Load Balancer Hardware and Software
How to Setup Nginx as loadbalancer for Apache or Tomcat for HTTP/HTTPS
Load-balancing Notes
websocket - TCP connections and traffic routing under HTTP load balancing - Stack Overflow
Simple load balancing with Apache proxy_balancer | thierolf.org
Reverse Proxy Guide - Apache HTTP Server Version 2.5
Apache 2.2 load balancing Tomcat 7 Issue - Server Fault
Running Tomcat Behind Apache with mod_rewrite and mod_proxy | Virtuozzo
How to configure Apache to serve as load balancer between 2 or more Webservers on Linux / Apache basic cluster - ☩ Walking in Light with Christ - Faith, Computing, Diary